below. This was the highest point collections were made by the writer but several species extend their range a few hundred feet higher and Dr J. secured a Draba at 15,000°. The – is a list of the species as they have been deter. and at the close a synopsis of the des. of the f. g. 4 sp. and this zone of 5000° may be considered as the temperate region and that above 9000° as alpine . Many plants of the subtropical region extend their range to the temperate and even to the alpine district, this being especially true of low growing plants like Oxalis, Stellaria Trifolium and several of the Malvas. The temperate zone between 4000° and 9000° is characterized nevertheless by many genera & families that are not present or are hardly noticeable in the more tropical regions. The genus Salvia and order Hythraceæ have an especially large distribution. Of the latter, Cuphea is the most important element growing in great abundance under all condi- tions of soil & moisture . Here are many representations from the Geraniaceæ, Boragin- aceæ, Scrophularineæ, Verbenaceæ, Bignoni- aceæ, Acanthaceæ and Amaranthaceæ which take the place in a great measure of the Cucurbits, Rubiaceæ, Aclepiads, Solanums, Euphorbias and Commelinas in the tropics. Great changes are experienced in the flora as the slopes are ascended above 9000°, and there are well marked zones for the dis- tribution of the plants till the limit of vege- tation is reached. Between 9000° and 10000°,